School Of Science, Engineering & Technology

The Artemis II mission features a four-astronaut crew tasked with a 10-day lunar flyby,

scheduled for no earlier than March 2026.
The includes Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialists Christina Koch and Jeremy Hansen, chosen for their extensive experience in engineering, piloting, and prior spaceflight.
II and
:-

1) Wiseman (Commander):
A1 : 27-year US Navy veteran, test pilot.
B1 : Bachelor’s in computer and systems engineering (Rensselaer Polytechnic Institute), Master’s in systems engineering (Johns Hopkins University), certificate in space systems (Naval Postgraduate School).
C1 : Selected 2009; 167 days in space

2 Glover (Pilot):
A2 : US Navy test pilot, first Black person to travel to deep space.
B2 : Bachelor’s in engineering (California Polytechnic State University), three Master’s degrees in engineering (Air University and Naval Postgraduate School).
C2 : Selected 2013; 6 months in space

3 Koch (Mission Specialist):( )
A3 : Electrical engineer, expert in scientific programs for NASA/NOAA, firefighter.
B3 : Bachelor’s in Electrical Engineering & Physics, Master’s in Electrical Engineering (North Carolina State University).
C3 : Selected 2013; record holder for longest single space flight by a woman.

4 Hansen (Mission Specialist):
A4 : Colonel in the Canadian Armed Forces, former fighter pilot.
B4 : Bachelor’s in space science (Royal Military College of Canada), Master’s in physics (University of Toronto).
C4 : Selected 2009 (Canadian Space Agency); this is his first space flight.

If encoder bearing jam can happen machine motor speed variation problem and also may occur OC fault in inverter?

Ans- , an encoder bearing jam can definitely cause machine speed variation problems and lead to an overcurrent (OC) fault in the inverter.
Here is how these issues are connected:
Machine Speed Variation.

The encoder provides crucial speed and position feedback to the inverter in a closed-loop control system.

) Increased Friction: A jammed or failing bearing creates excessive mechanical resistance and friction, making it difficult for the motor shaft to rotate smoothly.

) Inaccurate Feedback: The increased friction and irregular movement result in distorted or erratic signals from the encoder to the inverter.
Control Missteps: The inverter receives this poor feedback and attempts to compensate by adjusting its output frequency and voltage, but the inaccurate information leads to unstable and irregular motor operation, manifesting as speed variations or shaking.
) Stalling: In severe cases, the motor may struggle to maintain the commanded speed or stall completely.
(OC) Fault in Inverter :-
The mechanical jam directly increases the load on the motor, which in turn causes the inverter to trip on an overcurrent fault.
High Current Draw: When the motor encounters mechanical resistance (the jammed bearing), it attempts to draw significantly more current to produce enough torque to overcome the blockage and maintain speed.
Inverter Protection: The inverter is designed with internal protection mechanisms that monitor the current draw. When the current exceeds safe, predefined limits (especially during acceleration or constant speed operation), the drive shuts down and reports an OC fault to prevent damage to itself and the motor.

summary, a jammed encoder bearing is a significant mechanical fault that disrupts the motor's operation and feedback loop, leading to the control problems and safety shutdowns you described.

from the of and Caltech have achieved a breakthrough by using artificial intelligence to design a material that is as strong as carbon steel but lighter than foam. Instead of traditional trial-and-error experiments, the AI system generated entirely new lattice structures, which were then 3D-printed and tested. The result: nanolattices that showed up to five times the strength of titanium while staying incredibly lightweight — solving one of material science’s toughest challenges.

The implications are massive. Replacing titanium in airplanes could save up to 80 liters of fuel per kilogram each year, while in cars and buildings, the material could cut weight, increase safety, and reduce energy use. This isn’t just stronger steel — it’s a glimpse into a future where AI helps us invent matter itself, creating materials that humans alone might never have imagined.

School Of Science, Engineering & Technology stay with us gather knowledge

researchers, specifically from the National Institute of Information and Communications Technology (NICT), have repeatedly broken world records for internet speeds, with the most recent in mid-2025 achieving 1.02 petabits per second (Pbps) over 1,118 miles of optical fiber.

This experimental speed, achieved using advanced amplification and a 19-core optical fiber, could download all of Netflix in one second and is about 1 million times faster than current average home internet speeds, though widespread consumer adoption is still some time away.

Stay with School Of Science, Engineering & Technology School Of Science, Engineering & Technology group gather your knowledge

the roaring boom of the 1920s, Germany unveiled one of the most formidable forging ever constructed.
Designed by AG, this steam-hydraulic giant stood as a cornerstone of precision engineering able to forge some of the most complex and heavy-duty components in the world, including U-boat shafts, tank armor, and massive artillery barrels.

made it revolutionary wasn’t just its size, but its ability to shape ultra-dense steel with a force previously unimaginable in manufacturing. Located in Essen, this press powered Germany’s industrial rise between wars, becoming a key player in both civilian and military engineering projects—and a defining artifact of mechanical ambition.

Stay with us School Of Science, Engineering & Technology group School Of Science, Engineering & Technology gather your knowledge